7970 vs 7970ghz edition?

I see a lot of people saying that the 7970 regular is better to get and just overclock it to the same as the ghz edition. Then I see other people say the ghz edition is better so it's pretty confusing. The price difference for a slight clock boost seems kind of steep so I was just curious what is the better buy. Looking at the Sapphire OC with Boost model. Thanks!---Playing: Dragon's Crown, MLB the Show 13, Pikmin 3, Project X Zone, ETS23DS FC: 2191-7639-5571

I'm not opposed to overclocking, though I'd need to read up on doing it. I was more interested in if the ghz edition has better parts on the card like some reviews say.---Playing: Dragon's Crown, MLB the Show 13, Pikmin 3, Project X Zone, ETS23DS FC: 2191-7639-5571